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Modelling blood flow in the circle of Willis in continuous flow left ventricular assist devices: possible relevance to strokes.
Indian J Thorac Cardiovasc Surg
February 2025
Department of Engineering Design, Indian Institute of Technology Madras, Chennai, India.
Purpose: Despite significant improvements in the design and performance of continuous flow left ventricular assist devices (CFLVADs), one of the most important reasons hampering further penetration of this technology is the occurrence of adverse events, especially strokes. One of the well-known risk factors for strokes is hypertension which is particularly common in patients undergoing a CFLVAD implant. While the device is implanted in the heart, strokes happen due to pathology in the brain and we hypothesised that modelling the blood flow in the circle of Willis might shed light on the causation of strokes in this situation.
View Article and Find Full Text PDFCoupling between topological edge state and defect mode-based biosensor using phononic crystal.
Sci Rep
January 2025
TH-PPM Group, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62521, Egypt.
A wealth of details regarding an individual's state of health, like a person's respiratory and metabolic functioning, can be studied by analyzing the volatile molecules and atoms in human exhaled breath. Besides, the salinity of seawater is a crucial factor in understanding its characteristics because any variation in the salinity of seawater represents the variations in the hydrological, biological, and chemical distributions. In this paper, a symmetrical one-dimensional phononic structure is theoretically designed using two symmetrical crystals separated with a defective cavity.
View Article and Find Full Text PDFTheoretical insights into spacer molecule design to tune stability, dielectric, and exciton properties in 2D perovskites.
Nanoscale
January 2025
Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macau SAR 999078, China.
Two-dimensional organic-inorganic perovskites have garnered extensive interest owing to their unique structure and optoelectronic performance. However, their loose structures complicate the elucidation of mechanisms and tend to cause uncertainty and variations in experimental and calculated results. This can generally be rooted in dynamically swinging spacer molecules through two mechanisms: one is the intrinsic geometric steric effect, and the other is related to the electronic effect orbital overlapping and electronic screening.
View Article and Find Full Text PDFMechanical feedback links cell division and dynamics in growing cell collectives.
Soft Matter
January 2025
Department of Physics, University of Texas at Austin, Austin, TX 78712, USA.
Local stresses in a tissue, a collective property, regulate cell division and apoptosis. In turn, cell growth and division induce active stresses in the tissue. As a consequence, there is a feedback between cell growth and local stresses.
View Article and Find Full Text PDFAnomalous pumping in the non-Hermitian Rice-Mele model.
J Phys Condens Matter
January 2025
School of Physical Sciences, NISER, Jatni, Bhubaneswar, 752050, INDIA.
We study topological charge pumping (TCP) in the Rice-Mele (RM) model with irreciprocal hopping. The non-Hermiticity gives rise to interesting pumping physics, owing to the presence of skin effect and exceptional points. In the static one-dimensional (1D) RM model, we find two independent tuning knobs that can drive the topological transition, namely, non-Hermitian parameter $\gamma$ and system size $N$.
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